title: Synthesis and characterisation of cobalt, nickel and copper complexes with tripodal 4N ligands as novel catalysts for the homogeneous partial oxidation of alkanes.
abstract: Four new compounds of the general formula [M(L)(CH3COO)][PF6], where L is a tetradentate tripodal ligand such as tris[2-(dimethylamino)ethyl]amine (L1) or (2-aminoethyl)bis(2-pyridylmethyl)amine (L2) and M is Co(II), Ni(II) or Cu(II), have been prepared employing a simple two-step synthesis. The compounds have been characterised by elemental analysis, mass spectroscopy, IR spectroscopy and X-ray diffraction. The catalytic properties of the derivatives containing the aliphatic ligand L1 have been investigated in particular toward the oxidation of cyclohexane and adamantane in the presence of the sacrificial oxidantm-CPBA (meta-chloroperbenzoic acid). Good TONs and selectivity have been determined for the cobalt and nickel compounds.
authors.affiliation: Institut für Anorganische Chemie, Johannes Kepler Universität Linz (JKU), Altenbergerstr. 69, A-4040 Linz, Austria.
authors.forename: Elisa
authors.initials: E
authors.lastname: Tordin
authors.forename: Manuela
authors.initials: M
authors.lastname: List
authors.forename: Uwe
authors.initials: U
authors.lastname: Monkowius
authors.forename: Siegfried
authors.initials: S
authors.lastname: Schindler
authors.forename: Günther
authors.initials: G
authors.lastname: Knör
keywords: Alkane oxidation; C–H activation; Earth-abundant elements (Co, Ni, Cu); Homogeneous catalysis; Tripodal ligands